In researching the archives here, there seems to be some debate about 303 use on latex cuffs. The manufacturer sent me this link to read and said much of the information came from the manufacturer who makes most of the latex cuffs for the industry.
Kokatat specifically recommends 303 with their dry suites and encloses a sample packet with their repair kits.
well as somebody who was scolded a bit by another poster in a previous thread that “there is no good reason to not hang your drysuit” it seems that here is an article/blog by folks at IR and that they agree with me. If you want those latex seals to last just keep them in the dark (in a dresser or rubbermaid container when not in use).